ID 1.8.4.13 DE L-methionine (S)-S-oxide reductase. AN acetylmethionine sulfoxide reductase. AN free-methionine (S)-S-oxide reductase. AN fSMsr. AN methionine-S-oxide reductase. AN methionine sulfoxide reductase. AN methyl sulfoxide reductase I and II. CA [thioredoxin]-disulfide + H2O + L-methionine = [thioredoxin]-dithiol + CA L-methionine (S)-S-oxide. CC -!- The reaction occurs in the opposite direction to that given above. CC -!- Dithiothreitol can replace reduced thioredoxin. CC -!- L-Methionine (R)-S-oxide is not a substrate (see EC 1.8.4.14). CC -!- Formerly EC 1.8.4.5. DR P20099, BISC_ECOLI ; //